Description:-Single row, open-type, light weight plastic bearings.-This ball bearing has races made of PP (Polypropylene). The bearing balls are made of glass and the cage is reinforced nylon (GRPA66-25).-Deep Groove Ball Bearings are one of the most widely used rolling bearings. They are used to accommodate radial and axial loads in both directions.-With small friction and high-limit speed, Ball Bearings are cost-effective and require little maintenance.-PP Bearings are better in corrosion resistance than POM bearings.-Suitable for all kinds of industrial equipment, micro motor, small rotary motor, office equipment and so on.-With good self-lubricating performance and low friction, plastic bearings are specially for high precision and high speed operation. Specification:Model: 608Shielded Type: Open-TypeInner Race/Outer Race Material: PPBall Material: GlassCage Material: Nylon (GRPA66-25)Inner Diameter (d): 8mmOuter Diameter (D): 22mmThickness (B): 7mmDynamic Load Rating (Cr): 3.293kNStatic Load Rating (Cor): 1.379kNAccuracy Class: P0 (ABEC-1)Noise Level: Z1Number of Pack: 5 Pcs